47864821 has 8 divisors (see below), whose sum is σ = 48484800. Its totient is φ = 47248032.

The previous prime is 47864813. The next prime is 47864827. The reversal of 47864821 is 12846874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47864821 - 2³ = 47864813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47864827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45105 + ... + 46153.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600).

Almost surely, 2^47864821 is an apocalyptic number.

It is an amenable number.

47864821 is a deficient number, since it is larger than the sum of its proper divisors (619979).

47864821 is a wasteful number, since it uses less digits than its factorization.

47864821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595.

The product of its digits is 86016, while the sum is 40.

The square root of 47864821 is about 6918.4406480073. The cubic root of 47864821 is about 363.0826359336.

The spelling of 47864821 in words is "forty-seven million, eight hundred sixty-four thousand, eight hundred twenty-one".